Primary trace displayed with obvious fault occurring. A very intermittent secondary trace appearing.Fault with Ignition lead or Pico measurement ?Moved Seconday ignition sensor pp178 to another ignition lead and same happening.

Attempted on other bank of cylinders as comparison =Same. No positive result for secondary ignition .

Attempted setting up by selecting channel A =Secondary ignition probe and Selecting various KV scales. Still no reliable trace displayed from plug or king lead ?

Ran out of time from a customer point of view and Renewed Bank 1 Cylinder 4 ignition lead. Which has fixed the missfire issue and Could be seen on primary trace but no reliable secondary.

Am i missing something or can any one tell me a set up to use in future for reliable measurement ?

My personal view is that you should avoid the reliance on Pico's Automotive Pre-sets as often as possible.

In this instance, I would recommend that you forget any triggers, but instead change your "collection time" & put 20 seconds total screen time.

Assuming that you have your volt range set correctly, the only other consideration should be your "Samples" setting. Make sure that this is cranked up high enough, so that you capture enough detail. You can easily check this, by zooming into the fine detail to make sure that you have smooth detail in your coil oscillations.

I have an example somewhere, taken from a 750, where I scoped ignition primary on one bank, whilst using the front cylinder "secondary" (on the same bank) as a means of identifying the firing events.

The pre-sets are OK, but they should only be considered to be a rough starting point (in my opinion at least)